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APL Problem Solving Competition

The APL Quest Series

It seemed like a normal Friday until mid-afternoon. But on 4 February 2022, I embarked on a journey that, at the time, seemed to stretch impossibly far into… Read
Andrea Piseri presenting at Dyalog ’23, wearing glasses and a dark jumper, speaking with both hands raised slightly while addressing the audience.

Dyalog ’23 Videos: Week 2 – APL Problem Solving Competition

The section that is dedicated to the annual APL Problem Solving Competition is always one of my own favourite parts of a Dyalog user meeting, and the talks by… Read
The winning team of the Viking Challenge at Dyalog ’23 stands at the front of the room with a trophy, smiling and celebrating, while the audience applauds.

Dyalog ’23 Day 4: So Many Problems to Solve

We started Wednesday with an update to the co-dfns project by Aaron Hsu. Aaron is trying to make APL more accessible to more people for tackling more problems.… Read
A circle with centre O containing points A, B, C, and D on its circumference. The points are connected to form an inscribed quadrilateral, with diagonals AC and BD intersecting at the circle’s centre.

The 2021 APL Problem Solving Competition: Phase I – Best of Breed

By Stefan Kruger Stefan works for IBM making databases. He tries to learn at least one new programming language a year, and a few years ago he got hooked on… Read
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Highlights of the 2020 Problem Solving Competition – Phase II

With Dyalog’s APL Problem Solving Competition 2021 in full swing, it’s time to highlight some of the excellent solutions that were submitted to last… Read
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Highlights of the 2020 APL Problem Solving Competition – Phase I

We received some excellent competition entries this year. Once again, thank you to all those who participated, congratulations to this year’s winners,… Read
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2019 APL Problem Solving Competition: Phase I Problems Sample Solutions

The following are my attempts at the Phase I problems of the 2019 APL Problem Solving Competition. There are not necessarily “right answers” as personal… Read
An abstract geometric illustration in blue, orange, and gold tones symbolising structure, symmetry, and logical design — evoking the analytical nature of algorithmic problem solving.

2018 APL Problem Solving Competition: Phase I Problems Sample Solutions

The following are my attempts at the Phase I problems of the 2018 APL Problem Solving Competition. There are not necessarily “right answers” as… Read
Abstract digital landscape with glowing teal and blue data visualisations, including charts, candlesticks, and vertical bars, evoking financial analytics and algorithmic structures in a futuristic grid-like environment.

Winning the 2016 APL Problem Solving Competition – Finance Category

Today we had the third of the 3 grand prize winner presentations. Zack Batik is 23 years old and is in his second year studying for an undergraduate in Maths… Read
Close-up of a person working on a laptop displaying colourful DNA sequence data in a bioinformatics application, with scientific equipment, documents, and multiple monitors showing complex visual data in the background.

Winning the 2016 APL Problem Solving Competition – Bioinformatics Category

Today we had the second of the 3 grand prize winner presentations. Marinus Oosters is 25 years old and is in his second year studying for a Masters in Computer… Read
An abstract image of glowing orange and blue data streams, representing digital computation and interconnected systems.

Winning the 2016 APL Problem Solving Competition – General Computing Category

Today we had the first of the 3 grand prize winner presentations. Joshua David is 19 years old and is in his second year studying Computer Science at the… Read

How I won the Dyalog Programming Contest

Blog post from Arianna Locatelli’s presentation on how she won the Dyalog APL programming contest 2015. By Vibeke Ulmann #Dyalog15 Introduction Now it… Read
Abstract illustration with blue and black birds perched and in flight over a background of digital lines, grids, and fragmented data, evoking themes of communication and information flow.

Solving the 2014 APL Problem Solving Competition – How Tweet It Is

This post is the continuation of the series where we examine some of the problems selected for the 2014 APL Problem Solving Competition. The problems presented… Read
Diagram illustrating the Pythagorean theorem with three squares on the sides of a right triangle, showing that a² + b² = c² using grid areas.

Solving the 2014 APL Problem Solving Competition – It’s All Right

This post is the continuation of the series where we examine some of the problems selected for the 2014 APL Problem Solving Competition. The problems presented… Read
Abstract digital image with flowing lines and shimmering mesh patterns in warm gold and silver tones, evoking layered complexity and subtle structure, suggestive of pattern analysis or data transformation.

Solving the 2014 APL Problem Solving Competition – Cryptography Problem 3

This post is the continuation of the series where we examine some of the problems selected for the 2014 APL Problem Solving Competition. In this post… Read
Abstract digital artwork with layered mesh patterns and intersecting light beams in soft blue and copper tones, evoking themes of complexity, structure, and encoded information.

Solving the 2014 APL Problem Solving Competition – Cryptography Problem 2

This post is the continuation of the series where we examine some of the problems selected for the 2014 APL Problem Solving Competition. In this post… Read
Abstract digital artwork with flowing light patterns and glowing particles, suggesting data, encryption, or code decryption, in cool grey and black tones.

Solving the 2014 APL Problem Solving Competition – Cryptography Problem 1

This post is a continuation of the series where we examine some of the problems selected for the 2014 APL Problem Solving Competition. I’ll start by… Read
Logo of the APL Problem Solving Competition, showing a stylised grey brain-shaped maze with a circular target symbol on the left hemisphere.

Solving the 2014 APL Problem Solving Competition – it’s as easy as 1 1 2 3…

The winners of the 2014 APL Problem Solving Competition were recognized at the Dyalog ’14 user meeting and had a chance to share their… Read
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